Pattern GRRWRGRBRRRGRBRRRW

It is a 18 stripe tartan.

Colour Sequence

Tartans with this colour sequence

This pattern is a design lineage: every tartan below shares one colour order, whatever its owner — near-identical designs are grouped, the largest lineage first (#112: the pattern is a tartan's second parent, beside its family or clan).

Somerville Dress (Name?)